Rohm and Haas Company

Steven Charles Brown

Gary Robert Larson

Wei Zhang

David William Whitman

Catherine Ann Finegan

William Rohrbach

Andrew Paul Trapani

An aqueous composition comprising dispersed particles comprising: at least one unsaturated flow promoter and at least one copolymer formed by the polymerization of at least one ethylenically unsaturated nonionic monomer and at least one monomer bearing a pendant functionality which can react with the unsaturated flow promoter upon drying and exposure to oxygen.

Aqueous polymer dispersions with high unsaturated flow promoter content

The present invention is directed to producing a luminescent screen used in a cathode ray tube (CRT) suitable for monochromatic or chromatic images, such as, those utilized in televisions, computers or data monitoring equipment, which require CRTs. The method of the present invention produces an ablative layer of the luminescent screen having a smooth surface with reduced surface distortions, such as, streaks and waviness, which are typically produced by conventional coating processes. When a reflective aluminum film is deposited on such a smooth ablative layer, the reflective aluminum film is also provided with a smooth surface, since it typically conforms to the underlying smooth surface of the ablative layer. As a result, CRT images having reduced distortions are produced. The method of the present invention further provides for enhancing the brightness of CRT images, which results from utilizing low ash producing polymers in the ablative layer and the binder of a luminophor layer of the luminescent screen. The method of the present invention further provides for combining the step for volatilizing of the ablative layer and the binder in the luminophor layer with the step for cementing of the face plate of CRT with the cone of CRT, without adversely affecting the quality of the hermitic seal between the face plate and the cone.

Method for producing luminiscent screen

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Pottstown, PA, United States of America

Steven Charles Brown